CN219915001U - Hydrofluoric acid leak protection sampling device - Google Patents
Hydrofluoric acid leak protection sampling device Download PDFInfo
- Publication number
- CN219915001U CN219915001U CN202321261637.7U CN202321261637U CN219915001U CN 219915001 U CN219915001 U CN 219915001U CN 202321261637 U CN202321261637 U CN 202321261637U CN 219915001 U CN219915001 U CN 219915001U
- Authority
- CN
- China
- Prior art keywords
- cover body
- hydrofluoric acid
- sample injection
- piston
- sealing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 title claims abstract description 97
- 238000005070 sampling Methods 0.000 title claims abstract description 23
- 238000007789 sealing Methods 0.000 claims abstract description 57
- 238000002347 injection Methods 0.000 claims abstract description 47
- 239000007924 injection Substances 0.000 claims abstract description 47
- -1 polytetrafluoroethylene Polymers 0.000 claims description 9
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 8
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 7
- 230000002265 prevention Effects 0.000 claims 6
- 230000007797 corrosion Effects 0.000 description 7
- 238000005260 corrosion Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 3
- 229920002493 poly(chlorotrifluoroethylene) Polymers 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910000040 hydrogen fluoride Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Sampling And Sample Adjustment (AREA)
Abstract
The utility model relates to the technical field of injection pumps, in particular to a hydrofluoric acid leakage-proof sampling device, which comprises a sampling tube, a piston assembly arranged in the sampling tube, a lower sealing cover body arranged at the lower end of the sampling tube and connected with the sampling tube in a sealing way, and a push rod arranged at the lower end of the piston assembly and extending out of the sampling tube along the lower sealing cover body; the lateral wall of the lower sealing cover body is transversely provided with an overflow port communicated with the middle part of the lower sealing cover body. The utility model can sample hydrofluoric acid, prevent the hydrofluoric acid from leaking, avoid corroding equipment and has high safety.
Description
Technical Field
The utility model relates to the technical field of injection pumps, in particular to a hydrofluoric acid leakage-proof sample injection device.
Background
Hydrofluoric acid is an aqueous solution of hydrogen fluoride gas, is a clear, colorless, fuming, corrosive liquid, and has a severe pungent odor. Is easily dissolved in water and ethanol and slightly dissolved in diethyl ether. Has extremely strong corrosiveness and can strongly corrode metals, glass and objects containing silicon. If inhaled or touched by a person, burns can be caused which are difficult to cure.
The hydrofluoric acid needs to be sampled and separated in the production process; at present, the sample injection device of hydrofluoric acid has a complex structure, is inconvenient to control, is easy to generate hydrofluoric acid leakage, can harm the safety of staff, can corrode sample injection equipment, and causes great potential safety hazard.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model aims to provide the hydrofluoric acid leakage-proof sampling device which can divide and sample hydrofluoric acid, prevent the hydrofluoric acid from leaking, avoid corroding equipment and has high safety.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
the hydrofluoric acid leakage-proof sample injection device comprises a sample injection tube, a piston assembly arranged in the sample injection tube, a lower sealing cover body arranged at the lower end of the sample injection tube and in sealing connection with the sample injection tube, and a push rod arranged at the lower end of the piston assembly and extending out of the sample injection tube along the lower sealing cover body; the lateral wall of the lower sealing cover body is transversely provided with an overflow port communicated with the middle part of the lower sealing cover body.
As a preferable scheme of the hydrofluoric acid leakage-proof sample injection device, the lower sealing cover body comprises an upper cover body and a lower cover body, the outer diameter of the lower cover body is larger than that of the upper cover body, and the cover body is in interference fit connection with the inner wall of the lower end of the sample injection tube; the overflow port is arranged on the outer wall of the lower cover body.
As a preferable scheme of the hydrofluoric acid leakage-proof sample injection device, the outer side wall of the upper cover body is provided with a first sealing groove, and a first sealing ring is arranged in the first sealing groove.
As a preferable scheme of the hydrofluoric acid leakage-proof sample injection device, the middle part of the lower cover body is provided with an installation inner hole for installing the push rod, a second sealing groove is arranged in the installation inner hole, and a second sealing ring is arranged in the second sealing groove.
As a preferable scheme of the hydrofluoric acid leakage-proof sample injection device, the piston assembly comprises a piston and a piston lining arranged in the piston; and a third sealing ring and a fourth sealing ring are sleeved on the piston lining from bottom to top.
As a preferable scheme of the hydrofluoric acid leakage-proof sample injection device, the outer side of the overflow port is connected with a closed collecting device.
As a preferable scheme of the hydrofluoric acid leakage-proof sample injection device, the piston adopts a polytetrafluoroethylene piston.
As a preferable scheme of the hydrofluoric acid leakage-proof sample injection device, the sample injection pipe adopts a polytrifluoroethylene pipe.
As a preferable scheme of the hydrofluoric acid leakage-proof sample injection device, the wall thickness of the sample injection tube is 3mm-5mm.
As a preferable scheme of the hydrofluoric acid leakage-proof sample injection device, the lower end of the push rod is transversely provided with a mounting through hole.
Compared with the prior art, the utility model has the beneficial effects that: the utility model is provided with an overflow port on the lower sealing cover, and a little leaked hydrofluoric acid is discharged into the sealing collector through the overflow port; the hydrofluoric acid leakage is prevented, the corrosion to equipment is avoided, and the safety is high.
The lower sealing cover body is provided with a plurality of sealing rings, so that the sealing effect is good and the safety is high.
The sample injection tube adopts a Polytrifluoroethylene (PCTFE) tube, and has good corrosion resistance effect; the piston adopts Polytetrafluoroethylene (PTFE) piston, so that the corrosion resistance is improved, and the leakage-proof effect is enhanced.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art. Wherein:
FIG. 1 is an exploded view of the hydrofluoric acid leak-proof sample injection device of the present utility model.
Fig. 2 is a perspective view of a first embodiment of the present utility model.
Fig. 3 is a perspective view of a second embodiment of the present utility model.
Fig. 4 is a forward block diagram of the present utility model.
Fig. 5 is a schematic side view of the present utility model.
FIG. 6 is a schematic view of the structure of the sample tube of the present utility model.
FIG. 7 is a schematic view of the structure of the lower seal cap of the present utility model.
Fig. 8 is a schematic view of the piston structure of the present utility model.
FIG. 9 is a schematic view of a piston liner according to the present utility model.
Reference numerals in the drawings: 1. a sample inlet tube; 11. a connector; 2. a piston assembly; 21. a piston; 22. a piston liner; 22-1, a third sealing ring; 22-2, a fourth sealing ring; 3. a lower sealing cover body; 31. an upper cover; 31-1, a first seal groove; 31-2, a first sealing ring; 32. a lower cover; 32-1, mounting an inner hole; 32-2, a second sealing ring; 30. an overflow port; 4. a push rod; 41. and (5) installing the through holes.
Description of the embodiments
The preferred embodiments of the present utility model will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present utility model only, and are not intended to limit the present utility model.
Examples
Referring to fig. 1 to 9, in a first embodiment of the present utility model, there is provided a hydrofluoric acid leakage-proof sample injection device, wherein an overflow port is provided on a lower seal cover, through which a small amount of leaked hydrofluoric acid is discharged into a seal collector; the hydrofluoric acid leakage is prevented, the corrosion to equipment is avoided, and the safety is high.
Specifically, the device comprises a sample injection tube 1 made of poly (chlorotrifluoroethylene) (PCTFE), a piston assembly 2 arranged in the sample injection tube 1, a lower sealing cover body 3 arranged at the lower end of the sample injection tube 1 and in sealing connection with the sample injection tube 1, and a push rod 4 made of hydrofluoric acid-resistant metal arranged at the lower end of the piston assembly 2 and extending to the outside of the sample injection tube 1 along the lower sealing cover body 3; the side wall of the lower sealing cover body 3 is transversely provided with an overflow port 30 communicated with the middle part of the lower sealing cover body 3. The lower sealing cover body 3 comprises an upper cover body 31 and a lower cover body 32, the outer diameter of the lower cover body 32 is larger than that of the upper cover body 31, and the cover body 31 is in interference fit connection with the inner wall of the lower end of the sample injection tube 1; the overflow port 30 is provided on the outer wall of the lower cover 32. The outside of the overflow port 30 is connected with a closed collecting device, and the collecting device is communicated with a collector by adopting a corrosion-resistant collecting pipe.
Preferably, the upper end of the sampling tube 1 is provided with a connector 11 with external threads connected with an external container, the connector 11 and the sampling tube 1 are of an integrated structure, and a central hole of the connector 11 is communicated with the inside of the sampling tube 1. The lower end of the push rod 4 is transversely provided with a mounting through hole 41; the push rod 4 mounts the sample injection device on different syringe pumps through the mounting through hole 41.
Preferably, a first sealing groove 31-1 is provided on the outer sidewall of the upper cover 31, and a first sealing ring 31-2 is provided in the first sealing groove 31-1. The middle part of the lower cover body 32 is provided with an installation inner hole 32-1 for installing the push rod 4, a second sealing groove is arranged in the installation inner hole 32-1, and a second sealing ring 32-2 is arranged in the second sealing groove. The overflow port 30 communicates with the mounting bore 32-1 in the upper portion of the second seal ring 32-2. The sealing effect is good, the leakage of hydrofluoric acid is prevented, and the safety is high.
Preferably, the piston assembly 2 includes a Polytetrafluoroethylene (PTFE) piston 21 and a Polytetrafluoroethylene (PTFE) piston liner 22 disposed within the piston 21; the piston liner 22 is sleeved with a third sealing ring 22-1 and a fourth sealing ring 22-2 from bottom to top.
Preferably, the wall thickness of the sample injection tube 1 is 3mm-5mm. The wall thickness of the conventional optimal sample injection tube 1 is 3.5mm.
When the device is used, during liquid pumping and sampling, the injection pump pushes the push rod 4 to move downwards, hydrofluoric acid is pumped in from the upper port of the sample injection pipe 1 under the suction force of the piston 21, if a small amount of hydrofluoric acid leaks to the lower sealing cover body 3 along the inner wall of the sample injection pipe 1, the hydrofluoric acid enters the airtight collection device along the overflow port 30, so that the leakage of the hydrofluoric acid is prevented, and corrosion to equipment is avoided. If the hydrofluoric acid is required to be discharged out of the sampling tube 1 after sampling, the injection pump pushes the push rod 4 upwards to discharge the hydrofluoric acid from the upper port of the sampling tube 1, and a little leaked hydrofluoric acid is pushed into the sampling tube 1 by the piston 21 to circulate inside, so that corrosion to equipment is avoided. The safety is high.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments may be modified or some or all of the technical features may be replaced with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. The utility model provides a hydrofluoric acid leak protection sampling device which characterized in that: the device comprises a sample injection pipe (1), a piston assembly (2) arranged in the sample injection pipe (1), a lower sealing cover body (3) arranged at the lower end of the sample injection pipe (1) and in sealing connection with the sample injection pipe (1), and a push rod (4) arranged at the lower end of the piston assembly (2) and extending out of the sample injection pipe (1) along the lower sealing cover body (3); the side wall of the lower sealing cover body (3) is transversely provided with an overflow port (30) communicated with the middle part of the lower sealing cover body (3).
2. The hydrofluoric acid leak-proof sample introduction device of claim 1, wherein: the lower sealing cover body (3) comprises an upper cover body (31) and a lower cover body (32), the outer diameter of the lower cover body (32) is larger than that of the upper cover body (31), and the cover body (31) is in interference fit connection with the inner wall of the lower end of the sample injection tube (1); the overflow port (30) is arranged on the outer wall of the lower cover body (32).
3. The hydrofluoric acid leakage prevention sample introduction device according to claim 2, wherein: the upper cover body (31) is provided with a first sealing groove (31-1) on the outer side wall, and a first sealing ring (31-2) is arranged in the first sealing groove (31-1).
4. The hydrofluoric acid leakage prevention sampling device according to claim 3, wherein: the middle part of lower lid (32) is provided with installation hole (32-1) of installation push rod (4), is provided with the second seal groove in the installation hole (32-1), is provided with second sealing washer (32-2) in the second seal groove.
5. The hydrofluoric acid leakage prevention sampling device according to claim 4, wherein: the piston assembly (2) comprises a piston (21) and a piston liner (22) arranged in the piston (21); a third sealing ring (22-1) and a fourth sealing ring (22-2) are sleeved on the piston lining (22) from bottom to top.
6. The hydrofluoric acid leakage prevention sampling device according to claim 5, wherein: the outer side of the overflow port (30) is connected with a closed collecting device.
7. The hydrofluoric acid leakage prevention sampling device according to claim 5, wherein: the piston (21) is a polytetrafluoroethylene piston.
8. The hydrofluoric acid leakage prevention sampling device according to claim 1 or 5, wherein: the sample injection pipe (1) adopts a polytrifluoroethylene pipe.
9. The hydrofluoric acid leak-proof sample introduction device of claim 8, wherein: the wall thickness of the sample injection tube (1) is 3mm-5mm.
10. The hydrofluoric acid leak-proof sample introduction device of claim 9, wherein: the lower end of the push rod (4) is transversely provided with a mounting through hole (41).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321261637.7U CN219915001U (en) | 2023-05-24 | 2023-05-24 | Hydrofluoric acid leak protection sampling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321261637.7U CN219915001U (en) | 2023-05-24 | 2023-05-24 | Hydrofluoric acid leak protection sampling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219915001U true CN219915001U (en) | 2023-10-27 |
Family
ID=88432752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321261637.7U Active CN219915001U (en) | 2023-05-24 | 2023-05-24 | Hydrofluoric acid leak protection sampling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219915001U (en) |
-
2023
- 2023-05-24 CN CN202321261637.7U patent/CN219915001U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |